Analysis

  • max time kernel
    118s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    22-10-2021 08:05

General

  • Target

    Dhl Parcel.exe

  • Size

    338KB

  • MD5

    9a9edea8487b3aa7f0b92b131a2f100b

  • SHA1

    48e21000745dc66d5614b3a9f246e4fea1d1c8c6

  • SHA256

    ad47dd267e28398f802bab88cf1a9c75e9906e2c51eae57d0dcabad47540e700

  • SHA512

    69d3f7b4a196f2c8f9374e9a868766071ff91021429afba600728d5fc340e25c62d15bce3fab2c3d4953bdde95e4f77c89bb1513945e38b679d948f7db54d2b6

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1803146213:AAHYyCRx7FggQ9LfPbrIs79ZUWCEc9wNnDo/sendDocument

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Dhl Parcel.exe
    "C:\Users\Admin\AppData\Local\Temp\Dhl Parcel.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:972
    • C:\Users\Admin\AppData\Local\Temp\Dhl Parcel.exe
      "C:\Users\Admin\AppData\Local\Temp\Dhl Parcel.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:568

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\nsy4857.tmp\zwxoobcdhjo.dll
    MD5

    35fcf029de669fe8d13f87d2622e4fcb

    SHA1

    c691acb70efe7d3e34ca90dd4b94ff9b298dddf0

    SHA256

    c2b18bc2d235c0c178f225678abb67ef702e23663da9a45c82732b5e90d98a9e

    SHA512

    e8679833f30ce4c1c59afa13f6cae93b8ccf8d2ab954d5de4d3fd54119c90ad52e57f4ed2d944ae9a26062a91cd8aa39a20725e6a3b02b49119c05f6ef4c1cb4

  • memory/568-56-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/568-57-0x000000000040188B-mapping.dmp
  • memory/568-59-0x0000000004470000-0x00000000044A7000-memory.dmp
    Filesize

    220KB

  • memory/568-62-0x0000000004601000-0x0000000004602000-memory.dmp
    Filesize

    4KB

  • memory/568-61-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/568-64-0x0000000004603000-0x0000000004604000-memory.dmp
    Filesize

    4KB

  • memory/568-63-0x0000000004602000-0x0000000004603000-memory.dmp
    Filesize

    4KB

  • memory/568-65-0x0000000004604000-0x0000000004605000-memory.dmp
    Filesize

    4KB

  • memory/972-54-0x0000000076851000-0x0000000076853000-memory.dmp
    Filesize

    8KB